find the z test statistic

Statistics
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Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2.  Use the given sample sizes and numbers of successes to find the z test statistic for the hypothesis test.

 A random sampling of sixty pitchers from the National League and fifty-two pitchers from the American League showed that 15 National and 10 American League pitchers had E.R.A's below 3.5.    
Jul 29th, 2015

Thank you for the opportunity to help you with your question!

p1=60/15,p2=52/10 p = 92/5

92/5-3.5=14.9=149/10

Test statistic z=14.9

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 29th, 2015

my options are 

z=127.077

z=10.583

z=0.731

z=0.950

am I missing a step?

Jul 29th, 2015

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Jul 29th, 2015
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Jul 29th, 2015
Dec 2nd, 2016
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